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MLB Directional Home Run Park Factors Using Statcast (Updated)

Last April, I developed home run park factors based using a combination of home run per barrel rate (HR/BRL%) and non-barreled home runs. The data I used was from Baseball Savant. I gathered the data from each season 2015 through 2018 at each ballpark. Essentially how it worked was any park that allowed higher than league-average HR/BRL rates and allowed more non-barreled home runs were more favorable and vice-versa for parks that scored below-average. This was relatively simplistic but it allowed me to determine that Great American Ballpark in Cincinnati was the most friendly park in MLB for home runs and that Fenway Park in Boston is indeed a poor park for home runs. Naturally, the next step was to breakdown each park directionally (left field, centerfield, right field).


I pulled data from the last three seasons to determine directional home run park factors. I choose a three-year sample for two reasons. First, some of the sample sizes seemed a little small using just a single season of data. Second, combining two juiced ball seasons with one “dead ball” season may be a good way to aggregate how the 2020 ball might respond if there is a slight adjustment to the ball. Of course, it’s anyone’s guess as to how or if the properties of the ball will change, but at minimum I’m accounting for the range of possibilities here. Before I get down into the final park factors, below are the directional HR/BRL% for both right-handed hitters and left-handed hitters.

Left Field Centerfield Right Field
Right-Handed Hitters 75.82% 42.3% 49.65%
Left-Handed Hitters 46.80% 43.2% 73.55%

Not surprisingly, pulling the ball yields a much high home run percentage compared to balls hit to center or balls hit to the opposite field. Based on this information, I separated right-handed and left-handed hitters when determining the directional park factors due to the large discrepancies in HR/BRL%. For example, I ran home run park factors to left field for pulled fly balls by right-handed hitters and opposite-field fly balls hit by left-handed hitters. Then, I created a formula to combine the two for a final left-field park factor. I did the same thing for right field park factors. Hopefully, this makes sense. Just to be clear, these park factors are for home runs only. OK, enough of the boring explanations, let’s get to the Home Run Park Factors.


Note: 1.0 is neutral, less than 1.0 is below-average, over 1.0 is above-average

Home Run Park Factors Using Statcast (FreezeStats)

Venue/ParkTeamLF PFCF PFRF PF
GABPCIN1.1071.1361.176
Oriole ParkBAL1.1131.1441.012
Miller ParkMIL0.9841.1451.108
Coors FieldCOL1.0081.1441.055
Guaranteed Rate FldCWS1.0511.0321.114
Dodger StadiumLAD1.0041.2150.976
Citi FieldNYM1.0641.0271.057
Minute Maid ParkHOU1.1020.8861.155
Citizens Bank ParkPHI1.0790.9651.084
Angel StadiumLAA0.9111.1971.010
Petco ParkSDP1.0771.0550.981
Globe Life ParkTEX0.9731.0481.087
Yankee StadiumNYY0.9480.9311.212
Nationals ParkWSH1.0201.1020.936
Progressive FieldCLE0.9561.0311.054
T-Mobile ParkSEA0.9881.0261.006
Rogers CentreTOR1.0121.0060.995
Oakland ColiseumOAK1.0251.0080.943
SunTrust ParkATL0.9650.9991.003
Chase FieldARI1.0730.8611.006
Tropicana FieldTBR1.0180.9270.985
Wrigley FieldCHC0.9921.0270.909
PNC ParkPIT0.8801.0220.962
Target FieldMIN0.9660.9250.954
Busch StadiumSTL0.9141.0250.887
Marlins ParkMIA0.9290.9170.961
Kauffman StadiumKCR0.9550.8560.874
Comerica ParkDET1.0070.6920.958
Fenway ParkBOS0.9120.8620.844
Oracle ParkSFG0.9400.8540.717

Some things that jumped out at me upon seeing the results is that both Los Angeles ballparks are extremely favorable to centerfield. Dodger Stadium and Angel Stadium rank one and two, respectively for home runs to centerfield based on my HR Park Factors. Without diving in too deep, I noticed that Angel Stadium is perfect for Shohei Ohtani (the batter). Ohtani hits nearly 37% of his fly balls to centerfield and he absolutely crushes balls up the middle. It partially explains how he has maintained an insanely high 40.4% HR/FB on fly balls to center compared to league-average 10.5%. Another player who benefited from playing half his games in Angel Stadium over the last couple of seasons is Justin Upton (2019 injury notwithstanding). He’s hit a whopping 45.4% of his fly balls to centerfield since the start of 2018. There’s a reason that his HR/FB rate jumped once he was traded from Detroit to LA (23.4% w/ LAA compared to his career 16.6% HR/FB%).

On the flip side, centerfield at Comerica Park in Detroit is where fly balls go to die. That tweet was from back in April, so I had a feeling Detroit was awful to center but it’s worse than I thought compared to other parks. Consider this, since the start of 2017, no park has seen more barreled balls to centerfield than Comerica Park (404 barrels), but only 12.13% of those barreled balls turned into home runs (49 home runs). That is the fewest number of barreled home runs to centerfield since 2017 in all of baseball. That’s crazy! Just for fun, if Comerica played neutral to center, there would have been an ADDITIONAL 127 home runs hit over the last three seasons. If it played as favorable as Dodger Stadium has over that time frame, we would have seen a whopping 222 additional home runs to centerfield alone! It’s amazing Miguel Cabrera surpassed the 40-homer plateau multiple times while playing in Detroit despite hitting 35-40% of his fly balls to center. Nick Castellanos gets a huge boost wherever he lands in 2020 because he hit 41.5% of his fly balls to center in 2019.  


A few other interesting observations that jumped out at me is that Oakland Collusiem and Petco Park in San Diego actually play somewhat favorable for home runs. Both play above-average to centerfield and left field. So, let’s give Manny Machado another chance to bounce back in 2020 even though Petco is still a downgrade compared to Oriole Park. I’ll touch on Yankee Stadium’s right field but the park is below-average to center and left field. I’m beginning to understand why Aaron Judge hits so many balls to the opposite field. Citi Field, the other park in New York, ranks as the seventh most favorable park for home runs by my park factors. If you recall, they moved the fences in before the 2015 season, so that modification has done wonders for their hitters. It also makes what Jacob deGrom’s done over the last two seasons extremely impressive.

Oriole Park, Great American Ballpark (GABP), and Minute Maid Park are the top three parks for home runs to left field. I’m not surprised, because GABP is favorable to all fields and Minute Maid has the short porch in left thanks to the Crawford Boxes (84.14% HR/BRL for pulled FB to left). Although Minute Maid is even better for left-handed pull power but below-average to center. Oriole Park has proven to be more favorable for right-handed pull power and straight-away center but plays neutral to right field. We should shift our analysis for left-handed pull hitters and right-handed hitters who favor the opposite field in Baltimore as they may not see a boost in power numbers. PNC Park in Pittsburgh is the worst for home runs to left field but is OK to center and right. More on this in a future article.

Oracle Park is a nightmare for power hitters who favor right field. That’s a well-known fact of course. However, the fences are indeed coming in as the bullpen is now moving behind the right field wall! It’s hard to say how much this will improve the home run park factors in Oracle because the entire park plays unfavorable. Either way, I’m intrigued by Brandon belt (if he stays in SF), Mike Yastrzemski , and Alex Dickerson. In fact, one of my bold predictions involves Alex Dickerson surpassing 20 home runs in 2020. The number-one venue to right field is Yankee Stadium. Along with the juiced ball, it helped boost Didi Gregorius’ power numbers and resurrect Brett Gardner’s power. Great American Smallpark comes in at number two and how about Minute Maid Park ranking third to right field. It’s actually MORE favorable than left field with the Crawford Boxes! 

I had to dig a little deeper to find out why Minute Maid was so favorable to right field. It ranked second in HR/BRL% to right field and allowed the fourth-most non-barreled home runs. Minute Maid is only 326 feet down the right field line which is 11 feet deeper than the short porch in left field, however, the height of the wall is only seven feet high in right field as opposed to the 19 and 25-foot walls in left and left-center. In the power alley (right-center), the fence is 373 feet from home plate and 10-feet in height. Again, this is 11 feet further than left-center but with a much shorter wall. In other words, batted balls with a lower trajectory have a higher probability to be a home run to right field than to left field in Houston. Meanwhile, non-barreled fly balls with high launch angles to left field have left Minute Maid 113 times in three seasons, most in MLB.


My next article will look at hitters and some pitchers who are changing parks and how we should evaluate each player based on the park change. Obviously, we need to see more signings before that happens. To reiterate, these park factors do not consider singles, doubles, or triples, so they are not complete park factors. They are strictly measuring how favorable/unfavorable each park is for home runs to each part of the field using Statcast metrics (barrels and on-barrels). ESPN and FanGraphs along with several other sites have overall park factors, but we care about the long ball!

This metric can be extremely helpful for the evaluation of certain players who have extreme pull or oppo tendencies on their batted balls. Heavy pull hitters or hitters with a higher percentage of opposite-field fly balls can be analyzed and projected more accurately. I could also see where this metric could provide value for DFS purposes. For example, imagine righty-masher Joc Pederson in Yankee Stadium against a right-handed pitcher. That’s easy money right there. I’m open to any questions or ideas you may have as well. Feel free to hit me up on Twitter @FreezeStats.


 Photo courtesy of southerncal88
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Weekly Rundown – When Wil Myers Ever Slow Down?

Welcome to a special edition of Weekly Rundown with the All-Star break coming up this week. There’s actually nothing special about it except I gush over Jose Ramirez. Just as we all predicted, he’s tied for the league lead in homers and the Phillies are in first place. Does anyone realize than Franky Lindor has 85 runs already! How about Scooter Gennett leading the NL in batting average with Nick Markakis right on his heals. That seems about right. Nope. It’s baseball.

HOT Hitters
Welcome back Wil Myers! Myers is on a homer binge as he’s blasted 6 HR in the last 7 days and has chipped in with 2 steals, he’s been the top player over the past week. Is it just me or has Myers put up more production since coming off the DL than Hosmer has all season? I’m kidding obviously, but Hosmer has really had a boring season hasn’t he? I’ll touch on him later. Anyways, Myers has got his groove back and is no longer swinging at garbage outside the zone as much and in return has got a 50% hard contact rate over the past week. Remember, Myers is a 30-20 type player, so he could rip off double digit homers and steals the rest of the way.

Brett Gardner is playing baseball everyone! At nearly 35 years old, he’s still putting up some solid numbers as he’s popped 4 dingers and stolen 2 bases this past week. Get this, in the last two weeks, Gardner has a 12.9% walk rate with a 9.7% strikeout rate to go with a minuscule 2.7% swinging strike rate and a 100% zone contact rate (yes, he has not had a swing and missed in the zone since June 29th). Now, the rest of his batted ball profile leaves something to be desired, but as long as he’s making contact and getting on base, he will have value.

Whoa Starling Marte has hit a couple home runs and stolen 6 bases while hitting .407 in the last eight days. I’ll admit, I did not expect Marte to bounce back so well offensively, especially in the power department. But, here we are and Marte has 11 HR and 24 steals. Yup, those are stud type numbers. Actually, it basically matches Trea Tuner’s output to date. The issue is that Marte rarely plays 150 games, a total he’s reached once in his career. So, personally, I’m selling high. Now that he’s killing it going into the break, maybe you can flip him for a top 10 SP or a top 25 hitter.


Carlos Gonzalez has shown some life hitting three home runs, driving in 9 runs and hitting .450 this week. Now, the Rockies have been at home for a good portion of these numbers, but it’s still impressive. Unfortunately, I’m not buying this. He’s stockpiling stats at home but his IFFB% is up, his soft contact is up, and he’s swinging more but pitchers are throwing him less strikes. He’s also doesn’t run much anymore, so you aren’t getting value there. Oh and then there’s the Home/Road splits. He’s hitting .320 with 7 homers at home, good for a .409 wOBA but is hitting .243 with 3 homers good (bad) for a .280 wOBA on the road. Obviously, ride this out until the break, maybe you can flip him. He’s kind of a hitting streamer, but only at home from here on out.

We are past the 81-game mark and therefore Brian Dozier has started to go nuts. This dude has blasted 49 home runs in the second half the last two seasons! To put that in context, he’s hit 43 home runs in the first half of the last THREE seasons. Dozier basically turns into Aaron Judge in the second half. As I look at his profile, I’m not predicting 20+ homers in the second half this time around, but wouldn’t be surprised if he rips off another 15 with a handful of steals. That’s good for a top 35 player the rest of the way.

Mike Trout or Jose Ramirez, rest of season, who ya got? It’s seems crazy, but it’s not. Ramirez has four more home runs this week to tie him with Just Dong Martinez on the season, and has added a couple steals over the past 7 days. He’s driven in 10 runs over that time and there’s literally no stopping him. The best part about Jo-Ram’s transformation which began in 2017 is that he’s improved hard contact and increased his fly ball rate without sacrificing his already elite plate discipline. He’s actually improved on O-Swing the past three seasons. Oh and his .296 batting average could be unlucky with his .272 BABIP.

Hot Mentions: Alex Bregman has 4 HR and 8 RBI; Justin Smoak 4 HR and 7 RBI, Mookie Betts hitting .552 with 11 runs and 8 RBI this past week

HOT Pitchers
Do I have to lead with Chris Sale every week? No, but he’s striking everyone out and has allowed 1 ER in his last two starts. He’s struck out 24 batters in his last 13 IP, that gives him five straight games with at least 11 strikeouts. I think I’m bumping Sale up to number one overall for SPs in my All-Star break rankings coming out in a few days. Sale is kind of a machine. A really tall, rail-thin baseball slinging machine. At some point in his career he may breakdown, but I’m not betting against him at this point. No fire sale here.

Kyle Gibson just won’t go away. He’s grabbed a couple wins along with 18 Ks in his last two outings and this looks legit. Gibson is breaking out at age 30! I know, that’ seems late to be stuck with acne, but I digress. Look, Gibson has improved on his strikeout rate but he’s also throwing less strikes. As a result, the walks have jumped up. His hard contact against is up this year but the HR/FB is down. I’m not completely sold that he can keep this up. Walks + hard contact does not mix well. He’s 12-team viable, but as a back end starter.

Is Ross Stripling an Ace? I’m asking for a friend. Check out this post from @Smada_bb from yesterday basically comparing what Stripling has done in the first half compared to the best pitchers in the game. The answer is yes, he’s an ace. His strikeout rate is great, he doesn’t walk anyone, induces nearly 50% ground balls and an above average IFFB%. Sure, the LOB% isn’t going to stick at 90% and I do think the strikeout rate dips just a bit. Even still, he’s probably a 2.75-3.00 ERA pitcher with a great WHIP and solid strikeout rate. So, yeah, that’s a borderline top 10 SP.


I finally get to pour myself a nice glass of Jameson and discuss Taillon with you. He just came off a 10 K outing and has 16 over his last two starts. His 2.87 ERA and 0.87 WHIP in that time frame is more than solid. It’s all the slide-piece that he’s added. He’s had nine games started since the addition of the slider and here are the results: 3.29 ERA 1.19 WHIP 24.6% K%, 6.4% BB%, 11.2% SwStr, and a 3.07 FIP. MMM, that’s smooth, just like my favorite Irish Whiskey. I’m exciting for this development, but I still think Taillon is capped around a top 30-35 starter the rest of the season. That’s helpful, but I wouldn’t sell the whole barrel (get it) for him.

Zack Goldey has turned in a couple nice starts and even threw a scoreless inning in between this past week+. He’s given up only 2 ER in his last 13 IP with 16 strikeouts. Godley teased us earlier this year looking like he was getting back to last year. The problem is his cutter. It’s not good this year like is was in 2017. It’s way to hittable (if that’s a word), contact is up 8% against it and he’s given up an OPS of 1.015 when throwing the pitch. His control is off as well, so the walks are an issue. I’m not trusting this from Godley. You hurt me before bro, I won’t let you do it again.

Freezing Cold Hitters
I mentioned Eric Hosmer in the Wil Myers blurb and here he is! He’s been trash this past week netting 3 hits in 35 at bats without a homer or steal. I think Hosmer is the new example I use for Ground and Pound. I’ve been wanting to dig into Hosmer’s profile because I need a good dry heave. He’s upped his strikeout rate by 6%, swinging out of the zone more than league average and it’s backed up with an elevated 12.1% swinging strike rate. Here’s the kicker, he’s hitting the ball on the ground 62% of the time! That’s worse than Yelich, like way worse. Now he’s hitting under .250 with a .305 BABIP. Sure, he probably brings that up to .275 but with under 20 HR, he’s not worth much in terms of fantasy. No thanks.

Anthony Rizzo has just never got on track this year. He’s two for this last 23 without a home run. His power numbers are down but his season has been partially salvaged by driving in 60 runs. Really proving the the RBI stat is super meaningful. A .242 average and 12 HR is not going to cut it. Who does he think he is, Eric Hosmer? Rizzo has been unlucky with his .243 BABIP, especially with a solid 25% line drive rate, that does not compute. His hard contact is down, which is concerning because his fly ball rate is also down. Unless he changes his approach, we might have to expect a modest 20 homers from Riz this year. The average should rebound some and he will drive in over 100 runs, so there’s that.

Speaking of Chicago First baseman, Jose Abreu has been awful with only 1 hit this past week and a pathetic OPS of .100! Come on man, it’s the second half, you’re supposed to go nuts. Abreu has me more concerned than Rizzo. His hard contact is way down, like 6% down and his IFFB% is up. He may be pressing because his O-Swing is trash right now. He’s got to correct that by not chasing at bad pitches. If he’s not pressing, then he’s hurt. Either way, I cannot recommend him as a buy in the second half.

Trea Turner is hitting .138 this past week but has somehow managed 4 runs! “Thanks Anthony Rendon for driving me in whenever I’m on base.” That was Turner to Rendon after one of their games. Turner hasn’t stolen a base this week and I’m beginning to think he won’t sniff 50 SBs this year. Trea will be fine just as the Nationals heat up. He won’t reach the heights we hoped for but owners will be happy with Trea at the end of the season. Would I take Marte over Turner right now? Not a chance.

Hey Chris Taylor, maybe your 2017 was a bit of a fluke. It’s his lack of contact that’s the problem. He’s actually swinging outside the zone less but is whiffing more. His zone contact is nearly 5% below league average. That’s not good. I think he could still hit 20 homers but is only 4 out of 9 on the bases. Without a significant speed component to his game, he’s just another guy who is eligible at a bunch of positions. Best case scenario, he goes 20-10 with a .265 average.


Freezing Cold Pitchers
Mike Foltynewicz has been beaten around recently with 10 ER in his last 12.2 IP along with 4 homers! I’m willing to look the other way a bit because he came off the DL three weeks ago, but he was due for a little bit of regression prior to the injury. I am encouraged because his swing strike rates in the last three games have all been higher than his season rate of 10.6%. If Folty can prove that he can maintain his elevated strikeout rate, he’s a top 25 SP. A this point, I need to see a couple more starts before making a recommendation on buying or selling.

Dylan Bundy’s roller-coaster season continues as he’s allowed 10 ER in his last 7.1 IP with 5 walks and only 5 Ks. I recently rage dropped Bundy in my H2H 12-team mixed league. He’s too sporadic for H2H leagues and gives up far too many homers. His only plus pitch is his slider and when his control is off, you’re bound to get stuck with a 5-6 ER outing. A 1.74 HR/9 just isn’t going to play. I love the swing and miss stuff and believe in his upside, so I’d hold in 15-team leagues and deeper. Here are his earned runs given up in his last 7 games: 5, 5, 2, 4, 0, 0, 3. He also has two 7 run outings as well. Ugh, frustrating.

Tyson Ross was a pretty cool story for the first two months. Since then, he’s sporting a 5.91 ERA with only 29 strikeouts in 42.2 IP. Ross looks toast and probably needs the break more than anyone. Maybe he should take a couple weeks off on the DL. If he doesn’t, he is going to be a pitcher I look to stream against. Even if he does hit the DL, I can’t trust him again this year. Move along everyone.

Matt Boyd is another long-shot coming into the year. He showed some promise over the last year+ and with the addition of Chris Bosio as the pitching coach, I figured either Boyd or Norris would see some improvements. I don’t know what happened to Norris. He’s probably living in a van down by the river, literally. Boyd at least looked great for a couple months. He still wasn’t getting strikeouts. Turns out hes more or less the same guy he was last year. A low-end streamer. I guess Bosio isn’t some magic pitching genius. Oh well.